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Author Topic: Great top-making video with a surprise ending  (Read 138 times)

Jeremy McCreary

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Great top-making video with a surprise ending
« on: August 04, 2018, 03:51:43 PM »

There are lots of top-making videos on YouTube, but this one stands out -- partly because it's hard to see exactly where he's going with it until 8:55...

https://www.youtube.com/watch?v=WRRUcKGzuUI

Too bad the title puts the emphasis on spin time. Play value, visual design at rest, and visual effects at speed often take priority over spin time in the non-throwing tops I make. But this top has all that and an edo koma feel to boot. I consider the last the highest possible praise.
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Playing with the physical world through LEGO

Iacopo

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Re: Great top-making video with a surprise ending
« Reply #1 on: August 05, 2018, 03:28:00 PM »

In the sequence starting from 7:54 the top rises while spinning.  This was unexpected to me, because the friction of the cube on the spinning surface should slow the precession, and make the top to sink, not to rise.  But I have no idea of a possible cause.
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